High-Energy Astrophysics — MCQs

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1. What is the primary source of high-energy photons in the universe?





2. X-ray astronomy mainly studies which cosmic objects?





3. The Crab Nebula is a strong source of:





4. What is the typical energy range of X-rays?





5. What is the typical energy range of gamma rays?

7. Cygnus X-1 is known as a candidate:





8. What physical process generates synchrotron radiation?





9. What is inverse Compton scattering?





10. Which space telescope was specifically designed for X-ray astronomy?





11. Which space observatory is designed for gamma-ray astronomy?





12. What is the main power source of gamma-ray bursts (GRBs)?





13. Short GRBs are generally associated with:





14. Long GRBs are usually linked to:





15. Pulsars are rotating:





16. Millisecond pulsars spin with a period of about:





17. Magnetars are neutron stars with extremely high:





18. Accretion disks around black holes emit strongly in:





19. Active Galactic Nuclei (AGN) are strong emitters of:





20. What are jets from AGN mainly composed of?





21. Which galaxy hosts a famous giant radio jet?





22. What is the Eddington limit?





23. Pair production occurs when a gamma-ray photon converts into:





24. Cosmic rays are primarily composed of:





25. Which experiment studies ultra-high-energy cosmic rays?





26. The “knee” in the cosmic ray spectrum occurs at energies around:





27. The “ankle” in the cosmic ray spectrum refers to:





28. The Greisen–Zatsepin–Kuzmin (GZK) cutoff limits cosmic rays above:





29. Neutrino astronomy provides information about:





30. The IceCube experiment detects neutrinos using:





31. Supernova 1987A provided the first detection of:





32. Gravitational waves were first detected from:





33. LIGO and Virgo detect gravitational waves using:





34. What energy mechanism powers blazars?





35. The difference between blazars and quasars is due to:





36. TeV gamma rays are detected using:





37. Which telescope detects TeV gamma rays?





38. Which telescope is part of a system for ground-based gamma-ray detection?





39. The Cherenkov Telescope Array (CTA) is designed for:





40. Which mechanism explains particle acceleration in shocks?





41. Relativistic jets emit across which spectrum?





42. What limits the speed of jets in AGN?





43. High-energy neutrinos are expected from:





44. Which process dominates X-ray binaries?





45. The brightest X-ray binary in the Milky Way is:





46. Gamma-ray bursts typically last:





47. X-ray pulsars modulate X-rays due to:





48. The high-energy emission of supernova remnants comes from:





49. Which object emits the most energetic gamma rays in the universe?





50. High-energy astrophysics helps us probe:





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